Perhaps you should try some spelling variations:
thanh loi » thanh hoa, thanh hai, thanh lap
thang loi » thang long, thanh moi, nhung loi
hieu van » hieu va, thien van, lieu va
lang van » dang van, tang van, hoang van
duc van » duc va, duc tan, duc manh
tu sach » thu sach, su sach, te sach
nam duc » nam duoc, pham duc, nam thuc
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang xa) or (lang van)) hoi. hieu van nam duc van ((thang loi) OR (thanh loi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang van)) hoi. hieu van nam duc van ((thang loi) OR (thanh loi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (lang van)) hoi. hieu van nam duc van ((thang loi) OR (thanh loi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (lang van)) hoi. hieu van nam duc van ((thang loi) OR (thanh loi)) cua tre*.